Leica DM1000 LED manual Identification of gout

10. Measurements with the Microscope

•Move the orientation handle to its extreme right position; now the aligned crystals should be blue, and perpendicular yellow (fig. 52)

•Be sure to test crystals with the orientation handle in each position to insure positive identification

The following is the procedure for identifi- cation of pseudo gout:

The test for pseudo gout is done identically to the test for gout. However, the color change is opposite that of Gout. That is, with the handle at the left extreme, aligned crystals are blue and perpendicular crystals are yellow, and vice versa with the level at the right side (fig. 53).

Fig. 52 Identification of gout Fig. 53 Identification of pseudo gout

Test for Gout

Crystals

yellow Crystals blue

Handle

left

Crystals

blue Crystals yellow

Handle

right

Test for Pseudo Gout

Crystals

blue Crystals yellow

Handle

left

Crystals

yellow Crystals blue

Handle

right

50